I have been buying for a long time, so I have learned how to sell and move cull Romans to recuperate most of the cost of buying them. My ultimate goal is to keep the coins I want, and recover 50-75% of the cost though culls and individual coins... shouldn't be too hard.
I have been lucky so far in that I was able to ride a steep learning curve and only overpaid on a few of my earliest lots--everything else has either been a solid deal, or a complete steal.
One thing I am not sure of, is how to price uncommon or rare coins that are not in good shape. For example, here is a tiny bronze from Ephesos, Ionia:

Kind of hard to see, but it is attributable at least to that area and timeframe thanks to the bee and the right angle shape that is actually the forepart of a stag. I paid $2.50 for this and a tiny AE4 VOT Roman... probably the third lot I ever bought. This type of coin is seldom attributed due to the extreme level of corrosion, but any attributed Greek coin is not without value.
I am thinking the way to go for many is to put together specific lots--e.g. a lot of Greek city state coins; a lot of Hellenistic kings; 12 Caesars and golden age emperors; Severan and Crisis emperors; Constantine and later dynasties.
One trick I have learned is to charge enough in shipping that people who want a specific coin will be compelled to win multiple coins or lots to combine shipping. That trick has worked on me many times, and it will again in the future.
Edited by Finn235
03/29/2016 2:37 pm